Is it possible to exist without thought?
As a short answer I would say only in a state of unconsciousness.
And I use the Oxford definition of thought:
The action or process of thinking; mental action or activity in general, esp. that of the intellect; exercise of the mental faculty; formation and arrangement of ideas in the mind.
For me, all awareness involves thought, and I acknowledge many different forms of awareness, and suspect that there may in fact be an infinite class of types of awareness possible, and for me all of them fit within the general class of “thought”.
I acknowledge many different forms of connection to all that exists, and all that might possibly exist, and at the same time it seems clearly to me to also be true on several levels that we are each distinct individuals – despite the feelings to the contrary that can be generated in certain states of being.